Synonyms|744Antonyms|104|Broader|6Narrower|5Related|904

167 entries under adjective topic. ×

8
impulsive(noun, extraordinary, careless, wonderful)
8
brisk(fast, quick, rapid, speedy)
8
short(adverb, quick, brief, abrupt)
8
startling(extraordinary, wonderful, affected, shocking)
7
precipitant(violent, fast, quick, impulsive)
7
sheer(sharp, vertical)
7
speedy(fast, quick, abrupt, rapid)
6
accelerated(fast, abrupt, rapid, swift)
6
dramatic(moving, affected, exciting, immediate)
6
expeditious(fast, quick, abrupt, rapid)
6
fleet(fast, quick, abrupt, rapid)
6
instant(prompt, irritable, summary, bad-tempered)
6
shocking(extraordinary, wonderful, astonishing, astounding)
6
snap
6
unannounced
6
unplanned(noun, impulsive, rash, unthinking)
5
momentary(brief, immediate, instant, transitory)
5
reckless(noun, careless, casual, quick)
5
snappy(keen, energetic, violent, active)
5
spontaneous(noun, passionate, violent, careless)
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HarvardSmart Define 2016, sudden thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sudden/thesaurus/synonyms>.
MLASmart Define. "sudden thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/sudden/thesaurus/synonyms>